D. The reason for the fall of the Maya civilization is still unknown. There are many different theories attempting to explain the cause of the Classic Maya collapse and the abandonment of Maya cities in the southern Maya lowlands of Mesoamerica between the 8th and 9th centuries: climate change, drought, deforestation, etc. but although the drought is the leading theory at the moment the truth is yet unknown.
States and the federal government have both exclusive powers and concurrent powers. There is an ongoing negotiation over the balance of power between the two levels.
The X,Y,Z affair was an incident between French and American diplomats where they were trying to make a deal that would stop the French from seizing the America ships.
(that resulted in a war known as the Quasi-War.)
Americans were angered by this because the French agents wanted large amounts of money just to stop them from seizing their ships
<span> think the answer your teachers are looking for is D, but I disagree. Both of these concepts date back to ancient Greece or earlier. They resurfaced around the 18th century. </span>
